Lander



K. THULANDER.

DETACHABLE CYLINDER LOCK.

APPLICATION FILED APR.23,1915.

l 1 9%,682 Patented Aug. 15, 1916.

WTED -TATE PATENT @FFQE.

KONSTANTINE 'IHU'LANDER, OF ROCKFORD, ILLINOIS, ASSIGNOR 'IO NATIONAL LOCK 00., OF ROCKFORD, ILLINOIS, A CORPORATION OF ILLINOIS.

DETACHABLE-CYLINDER LOCK.

Specification of Letters Patent.

Patented Aug. 15, 19116.

, To all whom it may concern:

Be it known that I, KONSTANTINE THU- LANDER, a subject of the King of Sweden, residing at Rockford, in the county of Winnebago and State of Illinois, have invented certain new and useful Improvements in Detachable- Cylinder Locks, of which the following is a specification.

This invention relates to looks of the detachable cylinder type such as are commonly used on the drawers and covers of desks and like articles of furniture.

The object of the invention is to simplify and cheapen the cost of production of such locks, which object is attained mainly by a reduction of the number of parts heretofore required and an improved construction of the parts employed whereby the manipulation of the lock, especially as regards the 1nsertion and withdrawal of the key cylinder into and from the lock casing is facilitated.

The inventiomits manner of use, and its advantages will be readily understood when considered in connection with the following detailed description and the accompanying drawings wherein I have illustrated a practical and approved embodiment of the invention, and in which-- Figure 1 is a front elevation of the lock casing and key cylinder assembled; Fig. 2

.is a side elevation of the same, shown as mounted in a mortise in the front wall of a desk drawer or other lock-carrying member; Fig. 3 is a vertical section on the line 33 of Fig. 5; Fig. 4: is an elevation showing the bodyv of the lock casing, the bolt, key tumbler, and actuating spring of the cylinder retainer, with the casing cover, key cylinder, and cylinder retainer removed; Fig. 5 is a view similar to Fig. 4:, but showing the cylinder retainer in place and in locking engagement with the key cylinder; this figure being taken on the line 55 of Fig. 3, in section through the key cylinder; Fig. 6 is a view similar to Fig. 5, but showing the cylinder retainer actuated by inward movement of the bolt to released position relatively tothe key cylinder; Fig. is a vertical section on the line 77 of Fig. 5, showing the bolt and the cylinder retainer and their co6perating lugs in edge elevation.

'Beferring to the drawings, 10 designates the body and 11 the cover of an ordinary lock casing employed in looks of this character, these parts being united by rivets 12.

Within the casing are the bolt 13 and tumbler 14 mounted for cooperation with the key in the usual manner, these parts being of the usual construction except that the bolt is formed on one edge with a laterally projecting lug or shoulder 13; the purpose of which will hereinafter appear.

15 designates the key cylinder that is entered into the lock casing through a hole 16 in the cover 11 and extends through a hole 17 in the rear wall of the body 10. The key cylinder 15 is formed with an annular cam shoulder 18 thereon and an annular locking groove 19 directly in rear of said cam shoulder, as best shown in Fig. 3.

.20 designates a cylinder retaining plate that is slidably mounted within the casing above the bolt 13 and tumbler 14c, being guided by slots 21 engaging the rivets 12. This retaining plate is formed with a sub stantially central opening 22 of a size sufficient to admit the passage ofthe annular cam 18 of the key cylinder therethrough; and said retaining plate is further provided with a laterally projecting lug 20 (Fig. 7) on one edge thereof that extends beneath and across the path of movement of the lug or shoulder 13 of the bolt.

A spring 23 mounted on one of the rivets 12 engages at one end a lug 14' on the tumbler 14 to actuate the latter and at its other end engages an inturned lug 2 L on the lower edge of the retaining plate 20, thereby normally forcing the latter outwardly to a po sition wherein the lower edge of the opening 22 engages the locking groove 19 of the key cylinder 15, thereby locking the key cylinder to the lock casing. In this position of the parts, when the bolt 13 is in its retracted or unlocking position as shown in the several views of the drawings, the shoulder 13 of the bolt lies in engagement with the lug or shoulder 20 of the retaining plate, as clearly shown in Fig. 7

When it is" desired to withdraw the key cylinder in order to remove the lock, or for any other purpose, all that is necessary is to force the bolt 13 inwardly of the casing by means of a suitable tool applied to the outer end of the bolt, and this inward movement of the bolt, through the lugs 13' and 20', transmits an inward or downward movement to the retaining plate 20 that sufiices to carry the latter out of engagement with the locking groove 19 of the key cylinde that the details of structure and relative arrangement as herein shown might be variously modified without involving any substantial change in the structure of its principle of operation. It should therefore be understood that I do not limit myself to the exact construction herein shown and described, but reserve the right to make such variations therein as .fairly fall within the spirit and scope of the invention.

I claim: I

1. In a detachable cylinder-lock, the combination with a lock-casing and bolt, of a detachable key-cylinder, a cylinder-retainer located within said casing, and means whereby said retainer is actuated to cylinder-release position upon movement of said bolt inwardly of said casing.

2. In a detachable-cylinder lock, the combination with the lock casing and bolt, of a detachable key cylinder, a cylinder-retainer located within said casing, a spring normally maintaining said retainer in looking relation to said cylinder, and engaging members on said bolt and retainer whereby the latter is moved to cylinder-release position by a movement of said boltinwa'rdly of said casing.

3. In a detachable-cylinder lock, the combination with the lock casing and bolt, of a detachable key cylinder formed with an annular locking groove, a slidable cylinderretaining plate having a portion thereof adapted to enter said groove, a spring normally maintaining said retaining plate engaged with said groove, and engaging members on said bolt and retaining plate whereby the latter is moved to unlocking position relatively to said cylinder upon a movement of said bolt inwardly of said casing.

4. In a detachable-cylinder lock,'the combination with the lock casing, of a bolt hav. ing a laterally projecting lug, a detachable key cylinder formed with an annular lockmg groove, a slidable cylinder-retaining member having a portion thereof ada tedto enter said groove anda laterally pro ecting lug extending across the path of movement of said bolt lug, and a spring normally maintaining said retaining member engaged with said groove.

5. In a detachable-cylinder lock, the combination with the lock casing and bolt, of a slidable cylinder-retaining plate having an opening therethrough for the key cylinder, a key cylinder formed with a cam and a locking groove in rear of said cam adapted to cooperate with an edge portion of said retaining plate around said opening for entering said cylinder through and locking the same to said retaining plate, a spring normally maintaining said retaining plate engaged with said groove, and engaging members on said bolt and retaining plate whereby the latter is moved out of locking engage ment with said cylinder upon a movement of said bolt inwardly of said casing.

6. In a detachable-cylinder lock, the combination with the lock casing, of a bolt having a laterally projecting lug, a slidable cylinder-retaining plate having an ope therethrough for the key cylinder, a key dj f inder formed with an annular cam shoulder and an annular locking groove in rear of said cam shoulder adapted to cooperate with an edge portion of said retaining plate around said opening for entering said cylinder through and locking thesame to said retaining plate, a spring normally maintaining said retaining p ate engaged with said groove, and a laterally projecting lug on said retaining plate extending across the path of movement of said bolt lug.

7. In a detachable cylinder lock, the combination of a lock casing and bolt, a detachable key cylinder, a cylinder-retainer located within said casing, and operative connections between said bolt and "said retainer whereby said retainer is disengaged from the cylinder to permit removal of said cylinder upon movement of said bolt to abnor- 

